Concrete-mixing drum.



H. IUILFS.

CONCRETE MIXING DRUM. APPLICATION FILED 00141815.

Patentefi Dec; '26, 1916.

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HERMAN JUILFS, OF WHITE OAK, OHIO.

CONCRETE-MIXING DRUM.

Specification of Letters Patent.

Patented Dec. 26, 1916.

Application filed October 4, 1915. Serial No. 54,019.

To all whom it may concern Be it known that I, HERMAN JUILFs, a citizen of the United States, residing at White Oak, in the county of Brown and State of Ohio, have invented certain new and useful Improvements in Concrete-Mixing' Drums; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in concrete mixing drums, and the primary object of the invention is to provide an improved device of this character which is formed without any sharp angles in which the material to be mixed would clog, and yet will mix the same perfectly without the use of paddles or any other devices.

Another object of the invention is to pro vide a device which is simple and durable in construction, inexpensive to manufacture, and one which will be very efficient in operation.

With these objects in view, my invention consists of the novel features of construction, combination and arrangement of parts which will be hereinafter referred to and more particularly pointed out in the speci fication and claim.

In the accompanying drawings: Figure l is a side elevation of my improved concrete mixing drum; Fig. 2 is a top plan view of the same, and Figs. 3, 4, 5, and 6, are transverse sections of the drum, with the material therein, showing the four positions it will assume during its rotation, and the positioning of the material during the same.

In describing my invention, I shall refer to the drawing in which similar reference characters designate corresponding parts throughout the several views and in which the numeral 1 designates my improved mixing drum as an entirety, the same being shown in Figs. 1 and 2 as being supported by a frame 2 so that the same is rotatable on a horizontal axis. The mixing drum 1 has a movable top which is designated by the numeral 3, and which is secured to the same by any preferred form of locking means; for instance as shown in Figs. 1 and 2 of the drawings. This supporting structure involved may also have mounted thereon a clutch to regulate the The mixing drum 1 comprises a pair of flat sides 5 and 6, which are parallel with the horlzontal axis of the drum, and are disposed on either side of the same. These fiat sides 5 and 6 diverge outwardly from their lower ends, and the said lower ends of the same are connected by an outwardly curved side 7 which is arcuate in cross section, and this arcuate side '2' with the fiat sides 5 and 6 of the drum, is formed integrally so that when the same is in position as shown in Fig. 3 of the drawings and with the cover removed therefrom, 1s substantially U-shaped in cross section.

To the upper edges of the flat sides 5 and (5 is secured an outwardly curved top side 8 which is arcuate in cross section, and is removably attached to the said upper edges. This cover 8 is removably secured in position by any desired form of attaching means,

it being essential that the same be firmly and securely held thereto, during the operation of this drum, and also that it may be easily and quickly removed therefrom when it is desired to dump the batch of concrete after the same has been mixed. The top side 8 may be provided with a handle 9 to facilitate its removal from the drum for the aforesaid purpose. This drum is provided with end plates 10 at either end, which conform to the cross sectional outline of the drum, and are secured to the edges of the same by any desired means.

In operation, the top side 8 of cover 3 of this mixing drum is removed when the drum is in position as shown in Fig. 3 of the drawing; that is the first position, and a batch of material to be mixed is poured therein, said material coming up to the level as shown in Fig. 3 of the drawing; that is a short distance below the horizontal axis of the said drum. The cover 8 is then placed thereon, and securely fastened in position and the drum is rotated. As the drum begins to move, the material which is positioned in the bottom of the same and covers 35 it will be obvious that the material in this the inner surface of the curved side 7, will be carried along by gravity. When the mixer' turns in the direction of the" arrow, the particles begin to roll along the rounded bottom, whereby they will be moved from the same and lodged on the flat side 6 of.

the drum. This will beiaccomplished in the first quarter turn of the'drum, and the ma V terial will'assume the position as shown in Fig. 4 of the drawings. Further rotation of the drum, will cause the material to take the nature of a tilting motion, until'it lodges drum,

on the curved surface of the top side 8 of the as clearly shown in Fig. 5 of the drawings. vWhen in this position, the drum will have rotated one-half way around, and further rotation still in the direction of the arrow will" move the material from the curved surface of the top side 8 to the flat side 5 of the drum, it once more being given a rolling motion upon said movement. This position 1s clearly shown in Fig. 6' of the drawing, and from the said position further rotation of the drumwvill bring it back to for instance, on the side 6, as shown in Fig.

i, the same will slant downwardly, and when it is rolled onto the side '5 as shown in Fig. 6, the same will slant upwardly. Thus drum upon rotation of the same, will be subjected to a rolling and tilting movement, and

V rotation of said drum,

as has been hereinbefore stated, willbe subjected to four different movements upon each whereby the material will' be easily and efliciently mixed without the need of any additional accessories" dis- I posedinside of the drum.

This rotatable drum may bev inserted if desired in any type of concrete mixing sys:

or it may be used alone for varioils 1 N 'otherikinds of mixing. "On aocount'of the j p novel shapeof the drum, the; same presents i V '5'0' moves'without any sharp angles in which r f the material would be likely to clogand prei tem,

an inner surface upon which the material vent a perfect mixing. From the foregoing 'struction of my improv'eddevice, thejmanner of applying the same to use, and the opdescription of the eoneration thereof will be readily junderstood,

and it will be seenthatil have provided'a i simple, inexpensive, and eflicient'mea'ns for carrylng out the Objects ofjtheinvention. 1

Iclaim: A horizontal comprising a pair of fiat'opposed sides of equal width lying parallel with a nd spaced if e'quidistantly "from the axis of" 7 7 said sides being disposed in approximately the drum,

rotary cement mixing drum upright planes but having their upper edgesv spaced apart lower edges, a

edges of the sides and joining the latter at obtuse angles thereto, said bottom lying para greaterdistancethan their bottom connecting saidlower allel to the aforesaid axis and being curved in transverse section on an are described around the same, a removable top extending between the upper edges of the sides and ly-' 'ing parallel to the drum axis, said top being curved in transverse section on an are described around a point below said axis on a 7' vertical line passing through the latter, and .7 r

a pair of ends between which the sides, bottom and top extend, said ends being disposed in parallel planes at right angles .to' the drum axis 7 i V L r In testimony whereof I have'hereun'toset my hand in presenceof' two subscribing witnesses.-

Witnesses I r V. 'B.'I{IVNCAID,' V HARRY HOFFMAN.

HERMA -amuse V Copies of this patent may be obtained; for five cents each, by addressingthe Commissioner 3:1 am, i

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